Browsing by Author "HABTU WOLDEYESUS"

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    EFFECTS OF DIFFERENT LAND USE TYPES, SOIL DEPTH AND TOPOGRAPHY ON SELECTED PHYSICAL AND CHEMICAL PROPERTIES OF SOIL AT WUNKE WATERSHED OF GETO WOREDA, SOUTHERN ETHIOPIA
    (wolkite universty, 2023-10) HABTU WOLDEYESUS
    The study of soil's physical and chemical properties is critical for the sustainable management of agricultural resources and economic growth. The purpose of the study was to look into the effects of different land use types, soil depth and topography on selected physical and chemical properties of soil in the Wunke watershed of Geto woreda in southern Ethiopia. This study considered three land uses (cultivated, grazing, and enset land), two soil depths (0-20 and 20-40cm), and three topographic positions (upper, middle, and lower) in three replications. For laboratory analysis, a total of 54 composite samples were collected. A three-way analysis of variance (ANOVA) was performed using the general linear model (GLM) procedure of the statistical analysis system (SAS, 2008) to determine whether or not variations in soil their interaction were significant. The findings revealed that the majority of the soil's physical and chemical properties varied with, the interaction effect of land use, soil depth and topography. The interaction effects of land use and soil depth affected particle size distribution, BD, AP, OC, TN CEC, exchangeable bases and PBS. Exchangeable bases and PBS were all significantly influenced by the interaction effect of land use and topography. The interaction effect of soil depth and topography affected sand, silt, pH, AP, OC, TN, and Ca. The interaction effect of land use, soil depth, and topography affected CEC, exchangeable bases and PBS. The highest bulk density (1.17gcm-3) was found grazing land of lower depth, while the lowest (1.0 gcm-3) was found on enset land of lower depth. Soils on enset land had consistently higher pH values, followed by grazing and cultivated lands. , higher (4.1%) mean organic carbon content was found upper depth of lower topographic position and lower (2.4%) mean TN content values were found in cultivated land of lower depth. The effects of soil depth on soil properties revealed that the surface soil layer had the highest sand fraction, TN, OC, and CEC. The subsurface soil layer had the highest clay fraction and the lowest values of TN, OC, and CEC. The interaction effect of land use, soil depth, and topography on soil properties revealed that the lowest layers of soils with the highest exchangeable bases and CEC were found at the lower topographic position under the three land use types. Soil fertility in cultivated lands was lower than in enset and grazing lands. Most of the measured soil properties were better in enset land than in other land use soils, and lower topographic positions were better than upper and middle topographic positions.